Acidophilic adenoma refers to a functioning type of pituitary gland tumor that usually appears in the anterior lobe of the pituitary gland. The Acidophilic adenoma creates excessive secretion of growth hormones often resulting in Gigantism and Acromegaly. Acidophilic adenoma, likewise refers to a a tumor of the pituitary gland characterized by cells that can be stained red with an acid dye. Gigantism and Acromegaly can result from the hypersecretion of growth hormone caused by an Acidophilic adenoma.